The -R option used in this example sorts the profile table by the amount
of real time the script spent executing a given function. The "cumm call"
column reveals how many times each function was called, and the "s/call"
column reveals how many seconds each call to the function required, on
average.

To generate a calltree file that you can import into the KCacheGrind
profile analysis application, issue the pprof2calltree
comand.